CN105203182A - Closing Element For Fill Level Measuring Device And Fill Level Measuring Device - Google Patents
Closing Element For Fill Level Measuring Device And Fill Level Measuring Device Download PDFInfo
- Publication number
- CN105203182A CN105203182A CN201510513919.5A CN201510513919A CN105203182A CN 105203182 A CN105203182 A CN 105203182A CN 201510513919 A CN201510513919 A CN 201510513919A CN 105203182 A CN105203182 A CN 105203182A
- Authority
- CN
- China
- Prior art keywords
- cylindrical element
- cup member
- cylindrical
- final
- carrying unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/22—Attenuating devices
- H01P1/222—Waveguide attenuators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/52—Systems for transmission between fixed stations via waveguides
Abstract
A fill level measuring device (3) operating with the transit time method and a termination element (1) for a waveguide (2) of the fill level measuring device (3) has a carrier element (13) that is arranged between a first cylinder element (11) and a second cylinder element (12) and has an impedance-matching component (15) that is arranged on the carrier element (13).
Description
Technical field
The present invention relates to a kind of packed height measuring instrument for working according to traveling time method (Laufzeit-Verfahren)
the final element (Abschlusselement) of conductor means.In addition the present invention relates to a kind of packed height measuring instrument according to the work of traveling time method, it is with the conductor means for guiding electromagnetic signal at least formed by outer conductor and inner wire.
Background technology
For carry out the packed height measuring instrument of work according to traveling time method for, by evaluating traveling time by the electromagnetic signal guided along conductor means, apply so-called TDR-measuring principle (TimeDomainReflectometry, time domain reflection technology).Signal at this along conductor means-or be especially issued on the direction on the surface of the medium of at least one in two conductors forming conductor means-should be acquired in its packed height.If signal is encountered on the surface of medium, then signal is partly reflected at this place.Then can by the packed height being measured medium by the traveling time between the sending and receive of the signal that reflects.The large advantage of this guiding of microwave signal is, the ambient environmental conditions of change (ambient pressure that is that such as rise or that decline, rising or the temperature that declines) do not affect measurement precision and the traveling time of this external signal does not rely on the specific inductive capacity of medium.
Conductor at least has anchor portion (utilizing this anchor portion to make conductor be fixed on interface or flange) and freely towards the end of medium.Conductor is connected with electronic equipment via interface, and this electronic equipment produces signal to be passed and receives and evaluate by the signal reflected.
Exist in described packed height measuring instrument so-called " dead band (Totzone) ", it represents such packed height region of medium, and namely in this packed height region, measurement is infeasible or is only feasible in large inexactness situation.The reason in " dead band " is the impedance transition (Impedanzspr ü ngen) of the conductor assembly for conducted signal, and it occurs due to physical construction or due to geometric condition.
In " upper dead band " and " the lower dead band " at free end place that this distinguishes in such region (namely conductor assembly is introduced in container wherein).
In order to tackle the problem in upper dead band, being sometimes arranged to conductor assembly and being made up of two conductors, wherein, a conductor coaxial ground is around another conductor.The benefit of such coaxial conductor is that impedance remains unchanged on its geometry stretches.In addition such conductor usually also can easily with in the impedance matching of the latter linked electronic equipment of conductor assembly, this impedance is usually 50 ohm.
For the free end of conductor means it is known in the art that the impedance matching network that arranges impedance match part, terminal resistance or be made up of different electric members (resistance, electric capacity, coil etc.).Such as with reference to file EP2711673A1, DE10043838A1 or EP2154496A1.Especially be arranged in file EP2711673A1, inner wire is extended by end pieces and terminal resistance is in the end pieces as conductor.
Be arranged in the region of the free end of conductor means for the element of impedance matching at this and be therefore also limited by process conditions.
Summary of the invention
The object of the invention is to, propose a kind of final element as prior art alternatives.
According to final element of the present invention (releasing before solving for this final element and pointed object) first and be mainly characterised in that, between the first cylindrical element and the second cylindrical element, be furnished with at least one load-carrying unit and on load-carrying unit, be furnished with at least one impedance match part.
First and second cylindrical element are designed to be essentially column, and wherein matrix cross sections is such as circular or polygon.In a kind of design proposal, the side of at least one cylindrical element is provided with recess and/or valgus (Ausst ü lpung).But produce the overall impression of column generally, wherein usually can understand cylinder like this, namely highly be greater than the elongation of basal plane.In a kind of design proposal, at least one cylindrical element has the base with the outer peripheral edges more greater or lesser than the cylinder of the corresponding cylindrical element of expression at least one side place.
In a kind of design proposal, the first and/or second cylindrical element can be conducted electricity.In a kind of design proposal, the first and second cylindrical element are interconnected conductively.If correspondingly at least the first cylindrical element is connected with the conductor of conductor means conductively, then the electromagnetic signal of conductor is also transmitted via two cylindrical element.Alternatively only a cylindrical element is connected with the conductor of conductor means.
If two cylindrical element are the extension of inner wire or a kind of end pieces in mounted situation, then this at least one impedance match part on load-carrying unit is in this extension outside and is especially also in side direction relative to the longitudinal axis of inner wire.
Load-carrying unit is embodied as circuit board and has at least one circuit board in another design proposal in a kind of design proposal.
Impedance match part is at least one electric member and in another design proposal, forms a part for matching network in a kind of design proposal.
A kind of design proposal is: be provided with cup member (Becherelement); Cup member has the recess for holding the first cylindrical element at least in part; Cup member has the inner space with inner peripheral adjoined with recess; And load-carrying unit is arranged in the inner space of cup member.
In a kind of design proposal, cup member is designed to Rotational Symmetry.In another design proposal, cup member has coherent recess.In another design proposal, the internal space design of cup member becomes to be essentially cylindric.
Plug element is provided with in a kind of design proposal.Plug element has the recess for holding the second cylindrical element at least in part.
In a kind of design proposal, cup member and plug element are fixedly connected to each other.This is such as by welding, the bonding or realization that is threaded.The connection of shape and/or power cooperation is produced at this.
If cup member and plug element are fixedly connected to each other, then its protection load-carrying unit and especially at least one impedance match part.Suitable structure can be provided with for the connection between impedance match part and the conductor of conductor means.
In addition create compact final element generally, it can assemble and then only also must link together with conductor means or be positioned together.Therefore the manufacture of packed height measuring instrument is simplified significantly.
In a kind of design proposal, plug element has the central section be arranged in the inner space of cup member.In a kind of design proposal, plug element is implemented as Rotational Symmetry.In another design proposal, plug element has coherent recess.
In a kind of design proposal, plug element has support section, and wherein, the outer peripheral edges of support section are greater than the inner peripheral of the inner space of cup member.In a kind of design proposal, support section abuts against central section place.
A kind of design proposal middle impedance matching block be arranged in load-carrying unit away from the side of plug element.Impedance match part is between the bottom and load-carrying unit of cup member thus.In addition plug element is also positioned on load-carrying unit.Impedance match part is preferably located in the outside of cylindrical element and preferably depends on the design proposal of load-carrying unit and arrangement in addition and be arranged in side relative to cylindrical element.
In a kind of design proposal, be arranged to the first cylindrical element there is at least one blind hole.In design proposal that is alternative or that supplement, be arranged to the second cylindrical element there is at least one blind hole.
A kind of design proposal is, is provided with the recess at least one seal element between the first cylindrical element and cup member.Sealing element is such as O shape ring.Supplement or alternative design proposal is, is provided with at least one recess at least one seal element between the second cylindrical element and plug element.
At least one recess is respectively arranged with at least one seal element of accommodation in these two design proposals.Transition part between component (i.e. cup member or plug element) around this to be sealed in cylindrical element and to be corresponding by seal element.
In a kind of design proposal, the first cylindrical element and the second cylindrical element are arranged to be in alignment with each other and about load-carrying unit specular.
According to another instruction, the present invention relates to a kind of packed height measuring instrument according to the work of traveling time method, it is with the conductor means for guiding electromagnetic signal at least formed by outer conductor and inner wire, the feature of this packed height measuring instrument is at least, is furnished with a kind of final element in the design proposal explained above basis at the free end place of conductor means.
The first cylindrical element is arranged to via pin like elements and inner wire electrical contact in a kind of design proposal.In addition, the second cylindrical element is connected with setting element (Fixierelement) via retaining element.In addition setting element is connected with outer conductor via at least another retaining element.Finally in order to impedance matching impedance match part and inner wire and outer conductor electrical contact.
In a kind of design proposal, setting element is connected with outer conductor via two retaining elements (it is such as bolt).
Setting element is designed to similar band or beam and is alternatively implemented as substantially similar dish in a design proposal.
The direction surface thereof of outer conductor at least in part at final element in the region of free end in a kind of design proposal.
Accompanying drawing explanation
Specifically there is design and improve according to final element of the present invention and the multiple possibilities according to packed height measuring instrument of the present invention.To this, reference is in claim 1 and 9 following claim on the one hand, and reference is next by reference to the accompanying drawings to the description that embodiment is carried out on the other hand.In the accompanying drawings:
Fig. 1 shows the section of the indicative icon through packed height measuring instrument;
Fig. 2 shows the section through the final element in first scheme schematically shown;
Fig. 3 shows the section of the final element be passed in alternative plan,
Fig. 4 shows the three-dimensional icon of a part for final element shown in Figure 3, and
Fig. 5 shows the section of the intercept of the amplification through packed height measuring instrument.
Embodiment
Figure 1 illustrates the final element 1 of the conductor means 2 for packed height measuring instrument 3.
Realize packed height by the traveling time evaluating the electromagnetic signal propagated along conductor means 2 to measure.Inner wire 5 is surrounded coaxially at this outer conductor 4.
In outer conductor 4, there is hole 6, medium penetrates in cavity 7 round inner wire 5 by this hole.
In the application usually free end 8 towards at this unshowned medium.Relatively and anchor portion 9 place of putting is provided with interface 10 for being such as fixed on the wall of a container place comprising medium.
Fig. 2 shows the section through the final element 1 according to the first design proposal.
First cylindrical element 11 and the second cylindrical element 12 are arranged in centre with being in alignment with each other and the extension of especially inner wire in mounted situation.There is load-carrying unit 13 between, there is opening 14 therebetween and two cylindrical element 11,12 are arranged about this load-carrying unit specular.
Cylindrical element 11,12 extend at this longitudinal axis along final element 1.
Load-carrying unit 13 exists two impedance match parts 15 of the impedance matching being used as outer conductor and inner wire.
It is inner that load-carrying unit 13 is in cup member 16, the inner space 18 that this cup member has coherent recess 17 and adjoins with it.Conglobate hollow cylinder is designed substantially at this in inner space 18, and wherein impedance match part 15 is between the bottom of cup member 16 and load-carrying unit 13.Impedance match part 15 is also arranged in side relative to the longitudinal axis of final element 1 thus.
Hidden or closed cup member 16 by plug element 19, this plug element has recess 20 for the second cylindrical element 12 and this plug element is inserted in cup member 16 by central section 21.
Be provided with support section 22 adjacently with central section 21, the overall diameter of this support section corresponding to the cup member 16 be adjacent overall diameter and therefore terminate alignedly with cup member.
Plug element 19 fetches by means of Laser Welding (LBW) with cup member 16 and welds together in the region of support section 22.Therefore final element 1 forms the compact and unit of closed in itself, and it only also must be installed in the conductor means of packed height measuring instrument.
Lug boss is also contiguous to support section 22 place of plug element 19 herein.
In cylindrical element 11, be respectively arranged with blind hole 23 in the middle of 12, it has internal thread respectively at this.
In order to be sealed in the transition part between cylindrical element 11 and cup member 16 and the transition part between cylindrical element 12 and plug element 19, two cylindrical element 11,12 its side edge have respectively two circular around recess 24, be respectively arranged with the O shape ring as seal element 25 wherein.
About Material selec-tion, cylindrical element 11,12 at this by steel or to be usually made up of conductive material and cup member 16 and plug element 19 are made up of the polyetheretherketone (PEEK) of the example as electrically insulating material respectively.
Figure 3 illustrates another program of final element, it is closely similar with the scheme in fig. 2.Therefore the description to identical element is cast out.
Cylindrical element 11,12 this there is no the recess of side direction and instead respectively by holding element 26 around and be connected by laser bonding with holding element.Holding element 26 has coherent columniform shape and has the structure replaced be made up of protuberance and recess in outside in inside.Be designed to Rotational Symmetry at this holding element 26 and join to matchingly in cup member 16 or plug element 19.
Fig. 4 shows two cylindrical element 11,12 and the load-carrying unit 13 of the final element 1 in Fig. 3.
Can find out the base under narrowing at this at the first cylindrical element 11 place, this narrowing is contiguous to the exterior cylindrical convex shoulder place in this smooth extension.
Load-carrying unit 13 its outer edges and the inside edge of annular comprise surface of contact 27 respectively, and two impedance match parts 15 are connected conductively with this surface of contact.
Figure 5 illustrates, how final element 1 is connected with conductor means 2.
In the blind hole 23 of the first cylindrical element 11, there is pin like elements 28, it is for the electrical contact of inner wire 5.
Be provided with in the blind hole 23 of the second cylindrical element 12 with the retaining element 29 of bolt pattern, between final element 1 and retaining element 29, wherein there is the setting element 30 with beam form.Setting element 30 extends laterally until outer conductor 4, and the retaining element 29 other at two, this place realizes location.
Two cylindrical element 11,12 are the extensions of inner wire 5 in shown scheme, and wherein impedance match part to be positioned at outside this extension and at this even perpendicular to longitudinal axis.
Claims (10)
1. the final element (1) for the conductor means (2) of the packed height measuring instrument (3) according to the work of traveling time method, it is characterized in that, between especially conductive first cylindrical element (11) and especially conductive second cylindrical element (12), be furnished with that be especially designed to circuit board or that there is circuit board at least one load-carrying unit (13), and be furnished with at least one impedance match part (15) on described load-carrying unit (13).
2. final element according to claim 1 (1), it is characterized in that, be provided with especially rotational symmetric cup member (16), this cup member (16) has especially coherent recess (17) for holding described first cylindrical element (11) at least in part, described cup member (16) have be contiguous to described in the especially substantially columniform inner space with inner peripheral (18) at especially coherent recess (17) place, and described load-carrying unit (13) is arranged in the described inner space (18) of described cup member (16).
3. final element according to claim 2 (1), it is characterized in that, being provided with especially rotational symmetric plug element (19) and described plug element (19) has especially coherent recess (20) for holding described second cylindrical element (12) at least in part.
4. final element according to claim 3 (1), it is characterized in that, described plug element (19) has the central section (21) that is arranged in the described inner space (18) of described cup member (16) and described plug element (19) has support section (22), and the outer peripheral edges of wherein said support section (22) are greater than the inner peripheral of the described inner space (18) of described cup member (16).
5. the final element (1) according to claim 3 or 4, it is characterized in that, between described first cylindrical element (11) and described cup member (16) and/or between described second cylindrical element (12) and described plug element (19), be provided with at least one recess (24) at least one seal element (25).
6. the final element (1) according to any one of claim 3 to 5, it is characterized in that, described impedance match part (15) is arranged on the side away from described plug element (19) of described load-carrying unit (13).
7. final element according to any one of claim 1 to 6 (1), is characterized in that, described first cylindrical element (11) and/or described second cylindrical element (12) have at least one blind hole (23).
8. final element according to any one of claim 1 to 7 (1), it is characterized in that, described first cylindrical element (11) and described second cylindrical element (12) be in alignment with each other ground and about described load-carrying unit (13) specular ground arrange.
9. the packed height measuring instrument (3) according to the work of traveling time method, with the conductor means (2) for guiding electromagnetic signal at least formed by outer conductor (4) and inner wire (5), it is characterized in that, be furnished with final element according to any one of claim 1 to 8 (1) at free end (8) place of described conductor means (2).
10. packed height measuring instrument (3) according to claim 9, it is characterized in that, described first cylindrical element (11) is via pin like elements (28) and described inner wire (5) electrical contact, described second cylindrical element (12) is connected with setting element (30) via retaining element (29), described setting element (30) is connected with described outer conductor (4) via at least another retaining element (29), and described impedance match part (15) and described inner wire (5) and described outer conductor (4) electrical contact.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014107393.2A DE102014107393B4 (en) | 2014-05-26 | 2014-05-26 | End element for level measuring device and level measuring device |
| DE102014107393.2 | 2014-05-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105203182A true CN105203182A (en) | 2015-12-30 |
| CN105203182B CN105203182B (en) | 2021-03-09 |
Family
ID=53199847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510513919.5A Active CN105203182B (en) | 2014-05-26 | 2015-05-26 | Terminal element for a fill level measuring device and fill level measuring device |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9698456B2 (en) |
| EP (1) | EP2950059B1 (en) |
| CN (1) | CN105203182B (en) |
| DE (1) | DE102014107393B4 (en) |
| DK (1) | DK2950059T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107271000A (en) * | 2016-03-30 | 2017-10-20 | 赫拉胡克公司 | Device for measuring liquid level |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017102587A1 (en) * | 2017-02-09 | 2018-08-09 | Krohne Messtechnik Gmbh | Level switch and method for determining a level limit of a medium in a container |
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| US4035748A (en) * | 1974-09-26 | 1977-07-12 | Bunker Ramo Corporation | Coaxial impedance transducer pad |
| GB2161940A (en) * | 1984-07-20 | 1986-01-22 | Mitsubishi Electric Corp | High-frequency magnetic field generator/detector for nuclear magnetic resonance |
| CN86100127A (en) * | 1985-01-09 | 1986-07-16 | 蒂特拉·迪弗工业研究联合公司 | Utilize the method and the equipment therefor thereof of elastic wave measurement liquid level height |
| CN101194149A (en) * | 2005-04-07 | 2008-06-04 | 罗斯蒙德公司 | Tank seal for guided wave radar level measurement |
| US20100007441A1 (en) * | 2008-07-11 | 2010-01-14 | Fujitsu Limited | Coaxial connector having a dielectric material for impedance matching |
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| CN103675367A (en) * | 2012-09-25 | 2014-03-26 | Vega格里沙贝两合公司 | Coaxial probe comprising terminating resistor |
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2014
- 2014-05-26 DE DE102014107393.2A patent/DE102014107393B4/en active Active
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2015
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- 2015-05-22 US US14/719,712 patent/US9698456B2/en active Active
- 2015-05-22 EP EP15168974.2A patent/EP2950059B1/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4035748A (en) * | 1974-09-26 | 1977-07-12 | Bunker Ramo Corporation | Coaxial impedance transducer pad |
| GB2161940A (en) * | 1984-07-20 | 1986-01-22 | Mitsubishi Electric Corp | High-frequency magnetic field generator/detector for nuclear magnetic resonance |
| CN86100127A (en) * | 1985-01-09 | 1986-07-16 | 蒂特拉·迪弗工业研究联合公司 | Utilize the method and the equipment therefor thereof of elastic wave measurement liquid level height |
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| US20100007441A1 (en) * | 2008-07-11 | 2010-01-14 | Fujitsu Limited | Coaxial connector having a dielectric material for impedance matching |
| CN101738229A (en) * | 2008-11-17 | 2010-06-16 | 克洛纳有限公司 | Electromagnetic flowmeter |
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| CN107271000A (en) * | 2016-03-30 | 2017-10-20 | 赫拉胡克公司 | Device for measuring liquid level |
| CN107271000B (en) * | 2016-03-30 | 2020-06-19 | 赫拉胡克公司 | Device for measuring the level of a liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105203182B (en) | 2021-03-09 |
| EP2950059A1 (en) | 2015-12-02 |
| DE102014107393B4 (en) | 2020-04-23 |
| DK2950059T3 (en) | 2019-10-07 |
| DE102014107393A1 (en) | 2015-11-26 |
| US9698456B2 (en) | 2017-07-04 |
| EP2950059B1 (en) | 2019-07-10 |
| US20150340750A1 (en) | 2015-11-26 |
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